A stable and high-voltage-resistant inorganic/polymer double-layer electrolyte for LiCoO2-based all-solid-state Li batteries

Abstract

Lithium phosphorus oxynitride (LiPON), as an intermediate layer, can address the poor compatibility that exists between the LiCoO₂ cathode and the polyethylene oxide (PEO) electrolyte. At the cut-off voltage of 4.5 V, the as-assembled all-solid-state Li battery with the inorganic/polymer bilayer electrolyte delivers an initial discharge capacity of 173 mA h g⁻¹ and 87% capacity retention rate after 100 cycles.